YORKVILLE YBA300, Service Manual

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SEE LAYOUT DIAGRAM
PC8437 PHOTO
LEAD/PIN REFERENCE
M1297 PRODUCTION NOTES
1. Six #2345 spacers mount on top of the board.
2. Put the knobs on all the pots with glue before mounting the pcb.
3. C2, C3 #5840 are manual insert. See picture PC8437.
P
1
4
G2
8
5
NC
H H
3
K
6
G1
2
NC
7
G3
5881WXT
4
2
-V
A
5
7
3
1
B
+V
6
8
E C B
TO-92
MPSA63
MPSA43
MPSA13
2N5551
MPSA56
MPSA06
2N5401
FUNCTION KNOB REF
MODEL(S):-
PART#
R
R
R
R
R
R
F
F
F
F
F
F
P
P
P
P
P
P
N
N
N
N
N
N
N
N
N
N
N
N
K
K
K
K
K
K
K
K
K
K
K
K
{NEW}
BIASA
BIASB
BIASC
BIASD
BIASE
BIASF
M1297 Potlist
YBA300
P1A
P1B
P1C
P1D
P1E
P1F 4420
4420
4420
4420
4420
4420
3692
PCB
8799
TO220
Device
4
1
6
5
3
#
2
MODEL(S):-
PC#
*PLACE IMPLEMENTED CHANGES INTO BOARD HISTORY
PENDING CHANGE
X
X
X
X
X
X
PC
PC
PC
PC
PC
PC
YBA300
M1297 PENDING CHANGES
5
2
#
6
3
4
1
DATE
MODEL(S):-
VER# DESCRIPTION OF CHANGE
D
D
V
V
N
N
D
D
D
D
V
V
V
V
N
N
N
N
YBA300
M1297 Drilling History
11
8
5
2
12
9
6
13
10
7
3
4
1
D
D
D
D
V
V
V
V
N
N
N
N
D
D
D
D
D
D
D
D
D
V
V
V
V
V
V
V
V
V
N
N
N
N
N
N
N
N
N
12
9
6
3
#
13
11
10
5
4
8
7
2
1
DATE
MODEL(S):-
VER# DESCRIPTION OF CHANGE
D
D
V
V
N
N
D
D
D
12-JUN-2012
V
V
V
V02
N
N
N
PC8437: CHANGE C2, C3 TO #5840 22N 250V GG
2010/01/20 1.00p1 Complete re-design. Bias moved to back.
M1297 PCB History
YBA300
Aug 09 1.00P0 First Prototype
2010/02/22 1.00p2 Added R36 to standby bus.
2010/09/03 . Split screen net into +&-. Added header for X-F. Tweak bias.
Changed #4646 to 650 pattern. 1.00 2010/09/23
2010/12/10 . Chg R33A-F from 10k to 4k7. Final proto building 50pcs.
2011/01/25 2.00 PC8214:Add R36A-F, C17A-F. Move BEC_LOC and VCD. GG